Robert Klander on mon 9 feb 04
Hello folks,=20
Can anyone shed light on Brown Iron Oxide? Will it give same/similar =
result
to RIO in a brown glaze? I see that Laguna has it listed as a "natural =
Iron
Oxide, reddish brown raw color" It seems quite a bit more brown than RIO =
in
its raw state.
Thanks in advance,=20
Robert Klander
Charles Hughes on mon 9 feb 04
I too wondered at this, but have bought and used it with no difference in my glazes.
Charles Hughes
Robert Klander wrote:
Hello folks,
Can anyone shed light on Brown Iron Oxide? Will it give same/similar result
to RIO in a brown glaze? I see that Laguna has it listed as a "natural Iron
Oxide, reddish brown raw color" It seems quite a bit more brown than RIO in
its raw state.
Thanks in advance,
Robert Klander
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steve harrison on tue 10 feb 04
Hi Robert,
Brown iron oxide could originate for a couple of sources. It could
contain some limonite or ochre. This is hydrated iron oxide.
Brown iron oxide could also be Fe3O4 . This is an oxidation state half
way between the red Fe2O3 ferric oxide and the black FeO Ferrous form.
It could also be a natural mixture of several of the above.
However, the essential point is that you can use any of the different
forms to make iron coloured glazes. Because, in the kiln during the
first 600 to 1000 degrees of oxidised firing, all the different forms
of iron oxide convert to the same red form. That is if your kiln is
firing cleanly.
Best wishes
Steve Harrison
Hot & Sticky Pty Ltd
5 Railway Pde
Balmoral Village
NSW 2571
Australia
http://ian.currie.to/sh/Steve_Harrisons_books.html
On Tuesday, February 10, 2004, at 01:28 AM, Robert Klander wrote:
> Hello folks,
> Can anyone shed light on Brown Iron Oxide? Will it give same/similar
> result
> to RIO in a brown glaze? I see that Laguna has it listed as a
> "natural Iron
> Oxide, reddish brown raw color" It seems quite a bit more brown than
> RIO in
> its raw state.
>
> Thanks in advance,
> Robert Klander
>
> _______________________________________________________________________
> _______
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
>
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